Winter '11 / '12 - Late October Snow - NESIS

NCDC has given the late October snow storm a preliminary score of 1.75 (Category 1) on the NESIS scale.  This is the only October storm to have a NESIS rank.

Multiple daily snowfall records were set during this event (29th - 44; 30th - 103).  Many stations recorded their first ever snowfalls in October.  Still others received the highest daily October snowfall in their recorded history.

The long wave flow regime changed promptly in the storm's aftermath from ridge west-trof east to trof west - ridge east.

Once again...a negative NAO was missing in action during an historic east coast snowfall.

Daily AO...NAO...and PNA indexes here.

Related post:  October Snow Cover